Results 51 to 60 of about 1,710 (144)
Extending Zipf’s law to n-grams for large corpora
, 2009 Experiments show that for a large corpus, Zipf’s law does not hold for all rank of words: the frequencies fall below those predicted by Zipf’s law for ranks greater than about 5,000 word types in the English language and about 30,000 word types in the ...
Ha, Le Quan +3 more
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A Zipf’s Law-Based Method for Mapping Urban Areas Using NPP-VIIRS Nighttime Light Data
Remote Sensing, 2018 A significant difficulty in urban studies is obtaining urban areas. Nighttime light (NTL) data provide efficient approaches to map urban areas. Previous methods have utilized visual particularities of cities with ancillary data to obtain the optimal ...
Wenjia Wu, Hongrui Zhao, Shulong Jiang
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Evidence and Implications of Zipf’s Law for Integrated Economies [PDF]
This paper considers the distribution of output and productive factors among members of a fully integrated economy (FIE). We demonstrate that each member’s shares of total output and of total factors will be equal.
Haris Munandar +2 more
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LA CROISSANCE URBAINE CHINOISE RECONSIDÉRÉE [PDF]
Over the last decade, many researchers have focused on the study of different urban hierarchies and their evolution over time. These studies may or may not confirm Zipf’s law and emphasize the characteristics of urban growth. The question is then whether
Shihe FU +3 more
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On Zipf’s law and the bias of Zipf regressions
, 2020 City size distributions are not strictly Pareto, but upper tails are rather Pareto like (i.e. tails are regularly varying). We examine the properties of the tail exponent estimator obtained from ordinary least squares (OLS) rank size regressions (Zipf ...
Schluter, Christian
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Demography and the emergence of universal patterns in urban systems
Nature Communications, 2020 According to Zipf’s law, the population size of a city is inversely proportional to its size rank in any urban system. The authors show how demography explains this law as a time average of balanced migration between cities and how deviations express ...
Luís M. A. Bettencourt, Daniel Zünd
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, 2007 Zipf’s law states that the frequency of occurence of some event as a func-tion of its rank is a power-law function. Using empirical examples from dif-ferent domains, we demonstrate that at least in some cases, increasingly sig-nificant divergences from ...
Dror Feitelson
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The end of a paradigm: is Zipf’s law universal?
, 2010 Zipf’s law, City size distribution, Urbanization process, C, R,
E. Blumenfeld-Lieberthal, L. Benguigui
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A century of the evolution of the urban system in Brazil
, 2011 In this paper, we study the hitherto unexplored evolution of the size distribution of 185 urban areas in Brazil between 1907 and 2008. We find that the power law parameter of the size distribution of the 100 largest urban areas increases from 0.63 in ...
Holmes, Mark J. +3 more
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Les lois linguistiques de la brièveté : conformité chez le lémurien chanteur Indri indri
Revue de Primatologie, 2023 Vocal and gestural sequences of many primate species conform to two principles of compression: the compensation between the length of a construct and that of its constituents (Menzerath-Altmann law) and an inverse relationship between signal length and ...
Daria Valente +10 more
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